# Litmus vs MailSlurp

**Leader by Vioscale score:** MailSlurp

| Attribute | Litmus | MailSlurp |
|---|---|---|
| **Vioscale score** | 40.4 (12% (low)) | 49.5 (54% (medium)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | - | A testing and automation platform providing real email inboxes and phone numbers via APIs and SDKs, enabling developers to verify email flows, OTP delivery, and message behavior in automated tests and CI/CD pipelines. |
| features.capabilities | - | `{"open_source":false,"sms_testing":true,"api_assertions":true,"spam_score_check":true,"ci_cd_integration":true,"rendering_preview":true,"multi_user_inboxes":true,"production_sending_addon":true,"blocklist_deliverability_check":true}` |
| integrations.count | 12 | 8 |
| integrations.list | `[{"name":"Salesforce Marketing Cloud"},{"name":"Adobe Marketo"},{"name":"Oracle Responsys"},{"name":"Oracle Eloqua"},{"name":"HubSpot"},{"name":"Acoustic Campaign"},{"name":"Mailchimp"},{"name":"Campaign Monitor"},{"name":"Trello"},{"name":"Slack"},{"name":"Dropbox"},{"name":"Dreamweaver"}]` | `[{"name":"Zapier"},{"name":"Gmail"},{"name":"Outlook"},{"name":"Dropbox"},{"name":"Google Drive"},{"name":"Playwright"},{"name":"CypressJS"},{"name":"ACCELQ"}]` |
| market.availability | `{"primaryMarkets":["US","GB"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"web":true}` |
| pricing | - | `{"freeTier":true,"sourceUrl":"https://www.mailslurp.com/compare/sendgrid-pricing/","retrievedAt":"2026-08-25T12:11:49.908Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | - | freemium |
| pricing.price_level | - | low |
| pricing.transparent | - | no |
| security.gdpr | yes | - |
| security.soc2 | yes | yes |

## Capabilities (Email Testing Dev)

| Capability | Litmus | MailSlurp |
|---|:--:|:--:|
| **Capabilities** |  |  |
| API assertions | - | ✓ |
| Rendering preview | - | ✓ |
| Spam score check | - | ✓ |
| Blocklist deliverability check | - | ✓ |
| SMS testing | - | ✓ |
| Production sending addon | - | ✓ |
| Ci cd integration | - | ✓ |
| Multi user inboxes | - | ✓ |
| Open source | - | ✗ |

*Source: Vioscale. Generated 2026-09-01T15:18:47.262Z. "-" = undocumented, not absent.*